Flood protection can simply be made as:

on *:TEXT:*:#: {
if ($wildtok($1-,$+(*,$me,*),1,32)) {
if ($($+(%,hl,.,$nick),2) == $null) {
echo -at $nick highlihgted you in $chan saying: $1-
}
set -u10 $+(%,hl,.,$nick)
}
}